blocks|key|132916|text|由于您实现的是ICustomTypeDescriptor，因此不需要添加任何属性；您只需在PropertyDescriptor上覆盖IsReadOnly即可。我在想，编写一个中间类型来模仿(通过ICustomTypeDescriptor和TypeConverter)包装的类型，但总是返回只读的PropertyDesciptor实例应该很简单？如果你想要一个例子，请告诉我(尽管它不是微不足道的)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|132917|您可能还想检查一下是否有like+this提供的东西构建了它。|132918|entityMap|0|LINK|mutability|MUTABLE|url|http://www.visualhint.com/propertygrid^0|7|L|19|I|1U|A|2P|L|3B|D|43|H|0|C|9|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|H|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

Since you are implementing <code>ICustomTypeDescriptor</code> there is no need to add any attributes; you can just override <code>IsReadOnly</code> on the <code>PropertyDescriptor</code>. I'm thinking it should be pretty simple to write an intermediary type that mimics (via <code>ICustomTypeDescriptor</code> and <code>TypeConverter</code>) a wrapped type but always returns readonly <code>PropertyDesciptor</code> instances? Let me know if you want an example (it isn't trivial though).

You might also want to check whether something <a href="http://www.visualhint.com/propertygrid" rel="nofollow noreferrer">like this</a> offers it built it.

blocks|key|1227167|text|我已经找到了一个非常快速的解决方案，对于那些不关心属性网格被灰显的人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1227168|TypeDescriptor.AddAttributes(myObject,+new+Attribute[]{new+ReadOnlyAttribute(true)});
propertyGrid1.SelectedObject+=+myObject;|code-block|syntax|javascript|1227169|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have found a very quick solution for thoses who do not care about the propertygrid being grayed out.

<pre><code>TypeDescriptor.AddAttributes(myObject, new Attribute[]{new ReadOnlyAttribute(true)});
propertyGrid1.SelectedObject = myObject;
</code></pre>

blocks|key|132081|text|我的建议是编写一个从propertygrid控件继承而来的自定义控件，在该自定义控件中，布尔值为readonly，然后覆盖某些内容并检查if(readonly)则取消操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|132082|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My advice would be to write a custom control that inherits from the propertygrid control, and in that custom control, have a boolean value of readonly, and then override some things and check, if(readonly) then cancel the action

blocks|key|1227128|text|我碰到了这个。我想要一个只读但不灰显的控件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1227129|从属性网格控件继承，并通过添加以下代码来重写按键来创建您自己的只读版本|1227130|#Region+"Non-greyed+read+only+support"

Private+isReadOnly+As+Boolean
Public+Property+[ReadOnly]()+As+Boolean
++++Get
++++++++Return+Me.isReadOnly
++++End+Get
++++Set(ByVal+value+As+Boolean)
++++++++Me.isReadOnly+=+value
++++End+Set
End+Property


Protected+Overrides+Function+ProcessDialogKey(ByVal+keyData+As+Keys)+As+Boolean
++++If+Me.isReadOnly+Then+Return+True
++++Return+MyBase.ProcessDialogKey(keyData)
End+Function

Public+Function+PreFilterMessage(ByRef+m+As+Message)+As+Boolean
++++If+m.Msg+=+&H204+Then+'WM_RBUTTONDOWN
++++++++If+Me.isReadOnly+Then+Return+True
++++End+If
++++Return+False
End+Function
#End+Region|code-block|syntax|javascript|1227131|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I ran into this one. I wanted a control that was read only but not grayed out. 

Inherit from the property grid control and create your own read only version by adding the following code to override key presses

<pre><code>#Region "Non-greyed read only support"

Private isReadOnly As Boolean
Public Property [ReadOnly]() As Boolean
 Get
 Return Me.isReadOnly
 End Get
 Set(ByVal value As Boolean)
 Me.isReadOnly = value
 End Set
End Property


Protected Overrides Function ProcessDialogKey(ByVal keyData As Keys) As Boolean
 If Me.isReadOnly Then Return True
 Return MyBase.ProcessDialogKey(keyData)
End Function

Public Function PreFilterMessage(ByRef m As Message) As Boolean
 If m.Msg = &amp;H204 Then 'WM_RBUTTONDOWN
 If Me.isReadOnly Then Return True
 End If
 Return False
End Function
#End Region
</code></pre>

blocks|key|132955|text|我最终继承了PropertyGrid，并在选择属性时选择父类别。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|132956|简单，不需要使用TypeDescriptor。|132957|public+class+ReadOnlyPropGrid+:+PropertyGrid
{
++++public+ReadOnlyPropGrid()
++++{
++++++++this.ToolbarVisible+=+false;+//+categories+need+to+be+always+visible
++++}

++++protected+override+void+OnSelectedGridItemChanged(SelectedGridItemChangedEventArgs+e)
++++{
++++++++if+(e.NewSelection.GridItemType+==+GridItemType.Property)
++++++++{
++++++++++++if+(e.NewSelection.Parent+!=+null+&&+e.NewSelection.Parent.GridItemType+==+GridItemType.Category)
++++++++++++{
++++++++++++++++this.SelectedGridItem+=+e.NewSelection.Parent;
++++++++++++++++return;
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|132958|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I ended up inheriting from PropertyGrid and select the parent category whenever a property is selected.
Simple and no need to use TypeDescriptor.
<pre><code>public class ReadOnlyPropGrid : PropertyGrid
{
 public ReadOnlyPropGrid()
 {
 this.ToolbarVisible = false; // categories need to be always visible
 }

 protected override void OnSelectedGridItemChanged(SelectedGridItemChangedEventArgs e)
 {
 if (e.NewSelection.GridItemType == GridItemType.Property)
 {
 if (e.NewSelection.Parent != null &amp;&amp; e.NewSelection.Parent.GridItemType == GridItemType.Category)
 {
 this.SelectedGridItem = e.NewSelection.Parent;
 return;
 }
 }
 }
}
</code></pre>

I'm using a PropertyGrid in an application I am writing to allow users to view and sometimes edit instances of my objects. Sometimes the user may have a file open in read/write mode where they can make changes to the file through the property grid. In other cases they may have a file open in read only mode, and should not be able to make any changes to the objects through the PropetyGrid. My classes also have dynamic properties which are returned by implementing ICustomTypeDescriptor. Which is why I really want to take advantage of the built in flexibility of a PropertyGrid control.

There doesn't seem to be an easy way to set a Property-grid to a read only mode. If I disable a PropertyGrid this also prevents the user from scrolling the list. So I'm thinking the best way to do this is to add ReadOnlyAttributes to the properties at run-time. Is there some other way?

Readonly PropertyGrid

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在编写的应用程序中使用PropertyGrid，以允许用户查看对象的实例，有时还可以对其进行编辑。有时，用户可能会以读/写模式打开文件，在这种模式下，用户可以通过属性网格对文件进行更改。在其他情况下，他们可能会以只读模式打开文件，并且不能通过PropetyGrid对对象进行任何更改。我的类也有动态属性，这些属性是通过实现ICustomTypeDescriptor返回的。这就是为什么我真的想要利

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回答 5

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